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[/] [or1k/] [trunk/] [linux/] [uClibc/] [libc/] [inet/] [rpc/] [svc_auth_unix.c] - Blame information for rev 1325

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1 1325 phoenix
/*
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 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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 * unrestricted use provided that this legend is included on all tape
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 * media and as a part of the software program in whole or part.  Users
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 * may copy or modify Sun RPC without charge, but are not authorized
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 * to license or distribute it to anyone else except as part of a product or
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 * program developed by the user.
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 *
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 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
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 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
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 *
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 * Sun RPC is provided with no support and without any obligation on the
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 * part of Sun Microsystems, Inc. to assist in its use, correction,
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 * modification or enhancement.
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 *
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 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
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 * OR ANY PART THEREOF.
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 *
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 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
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 * or profits or other special, indirect and consequential damages, even if
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 * Sun has been advised of the possibility of such damages.
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 *
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 * Sun Microsystems, Inc.
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 * 2550 Garcia Avenue
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 * Mountain View, California  94043
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 */
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/*
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 * svc_auth_unix.c
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 * Handles UNIX flavor authentication parameters on the service side of rpc.
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 * There are two svc auth implementations here: AUTH_UNIX and AUTH_SHORT.
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 * _svcauth_unix does full blown unix style uid,gid+gids auth,
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 * _svcauth_short uses a shorthand auth to index into a cache of longhand auths.
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 * Note: the shorthand has been gutted for efficiency.
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 *
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 * Copyright (C) 1984, Sun Microsystems, Inc.
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 */
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#define __FORCE_GLIBC
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#define _GNU_SOURCE
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#include <features.h>
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#include <stdio.h>
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#include <string.h>
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#include <rpc/rpc.h>
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#include <rpc/svc.h>
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/*
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 * Unix longhand authenticator
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 */
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enum auth_stat
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_svcauth_unix (struct svc_req *rqst, struct rpc_msg *msg)
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{
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  enum auth_stat stat;
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  XDR xdrs;
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  struct authunix_parms *aup;
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  int32_t *buf;
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  struct area
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    {
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      struct authunix_parms area_aup;
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      char area_machname[MAX_MACHINE_NAME + 1];
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      gid_t area_gids[NGRPS];
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    }
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   *area;
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  u_int auth_len;
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  u_int str_len, gid_len;
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  u_int i;
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  area = (struct area *) rqst->rq_clntcred;
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  aup = &area->area_aup;
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  aup->aup_machname = area->area_machname;
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  aup->aup_gids = area->area_gids;
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  auth_len = (u_int) msg->rm_call.cb_cred.oa_length;
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  xdrmem_create (&xdrs, msg->rm_call.cb_cred.oa_base, auth_len, XDR_DECODE);
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  buf = XDR_INLINE (&xdrs, auth_len);
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  if (buf != NULL)
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    {
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      aup->aup_time = IXDR_GET_LONG (buf);
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      str_len = IXDR_GET_U_INT32 (buf);
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      if (str_len > MAX_MACHINE_NAME)
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        {
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          stat = AUTH_BADCRED;
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          goto done;
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        }
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      memcpy (aup->aup_machname, (caddr_t) buf, (u_int) str_len);
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      aup->aup_machname[str_len] = 0;
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      str_len = RNDUP (str_len);
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      buf = (int32_t *) ((char *) buf + str_len);
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      aup->aup_uid = IXDR_GET_LONG (buf);
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      aup->aup_gid = IXDR_GET_LONG (buf);
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      gid_len = IXDR_GET_U_INT32 (buf);
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      if (gid_len > NGRPS)
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        {
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          stat = AUTH_BADCRED;
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          goto done;
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        }
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      aup->aup_len = gid_len;
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      for (i = 0; i < gid_len; i++)
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        {
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          aup->aup_gids[i] = IXDR_GET_LONG (buf);
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        }
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      /*
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       * five is the smallest unix credentials structure -
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       * timestamp, hostname len (0), uid, gid, and gids len (0).
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       */
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      if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len)
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        {
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          (void) printf ("bad auth_len gid %d str %d auth %d\n",
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                         gid_len, str_len, auth_len);
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          stat = AUTH_BADCRED;
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          goto done;
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        }
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    }
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  else if (!xdr_authunix_parms (&xdrs, aup))
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    {
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      xdrs.x_op = XDR_FREE;
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      (void) xdr_authunix_parms (&xdrs, aup);
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      stat = AUTH_BADCRED;
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      goto done;
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    }
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  /* get the verifier */
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  if ((u_int)msg->rm_call.cb_verf.oa_length)
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    {
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      rqst->rq_xprt->xp_verf.oa_flavor =
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        msg->rm_call.cb_verf.oa_flavor;
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      rqst->rq_xprt->xp_verf.oa_base =
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        msg->rm_call.cb_verf.oa_base;
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      rqst->rq_xprt->xp_verf.oa_length =
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        msg->rm_call.cb_verf.oa_length;
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    }
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  else
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    {
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      rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL;
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      rqst->rq_xprt->xp_verf.oa_length = 0;
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    }
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  stat = AUTH_OK;
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done:
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  XDR_DESTROY (&xdrs);
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  return stat;
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}
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/*
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 * Shorthand unix authenticator
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 * Looks up longhand in a cache.
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 */
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/*ARGSUSED */
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enum auth_stat
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_svcauth_short (struct svc_req *rqst, struct rpc_msg *msg)
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{
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  return AUTH_REJECTEDCRED;
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}

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